Yes - I have experienced it in the past. Another wiring scheme you may see is the "pigtail" connection of the cable shield terminating to the connector shell (if your lucky) but more typical it is terminated to the metal portion of the connector body. Both methods of terminating the cable shield is marginal at best. Still - these cable are advertised in the product catalogs as "shielded" cables. If the cost of a typical shielded cable is around $5-8 beware!!! A will constructed shielded cable (typ 10') will run around $15-30 each. After constantly running into this issue with our purchasing people (as they are always looking at ways to save a few $'s) I created an "in-house" engineering standard dealing with proper cable shielding & construction. Now when our purchasing group goes looking for a new cable supplier they send out the standard, if they can not supply cables complying with the standard - we don't even bother bringing in a sample for evaluation. This has worked very well for us over the past 3 years. I hope this sheds some light on the issue.
-----Original Message----- From: Darrell Locke (msmail) [mailto:[email protected]] Sent: Wednesday, September 06, 2000 5:27 PM To: '[email protected]' Subject: Shielded Cables We recently received some shieled PS-2 cables from a vendor. Upon inspection of the cables I saw that the shield was not soldered positively to the shell, it was just twisted back, I guess in hope that the wire would make contact. When we returned these to the vendor they said "you never asked for that. We'll gladly do it for an extra charge". Huh? Am I in another world here? I assumed that all shielded cables were positively connected to the shell, at least all the ones I have seen. Has anyone else encountered this? How prevalent is this in others experience? Darrell Locke Advanced Input Devices ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
